Quote from gkishot:
Why would futures get a break?
Because even the proponents of the tax have mentioned that the futures would be taxed differently, that's why. I heard one guy mention 1/10 of the normal suggested tax rate.
In what sense they are different from stocks?
In the sense that they are extremely highly leveraged, like options. You can't make someone pay $5.00 to buy an at the money call on a $50 stock and then tax them 0.001% of the entire value of the underlying stock on that call, because that would be a tax of $50 on something that only cost $5.00 to buy in the first place! Similarly, you can't tax futures at the value of the underlying instrument because they are also highly leveraged.
Position size that what counts for your PnL as well as for the government's PnL.
Why should the government be concerned with your leverage? They won't.
Of course they will. A $250 R/T tax would increase the cost of doing business on the CME by 50 TIMES. That is a 5000% increase in the cost of getting in and out of a position. If they do that, the CME shuts down the next day as revenue and trade volume literally drops to ZERO. Nobody is going to buy a contract on the S&P 500 if it has to move 5 full handles just to get you to break even. That's why it's not even remotely going to happen, period. Use your head.